Stop-valve and tap.



J/T. SHELDON.

STOP VALVE AND TAP.

APPLIGATIO! FILED PEILL'IDIO. 1,002,000. I Patented Aug. 29, 1911.

2 SHEETS-SHEET 1.

Mr/ymm 1 wig/1m 7 1/0/11: [War/MM J. T. SHELDON."

STOP VALVE AND TAP.

APPLICATION FILED rmm, 1910.

1,002,000, Patented Aug. 29,1911.

2 BHEBTSSIIEET 2.

JOHN 'rnomis SHELDON, or FER'NnILL, mew sou'rn WALES, nr'rsraama.

" To all whom it may eoncemf. i Be itknown thatI, JOHN s'rjor-vanvn ann 'rar,

' THoMAs S EL- DON, a subject of the King of Great Britain "a'nd'lreland, residing-at (Dlgate,?"Fernh1 ll street, Fernhill, .in the- State of New South VVales, Commonwealth of Australia, have the, following is a specification.

invented-certain new and useful Improyements in- Stop-Valves and- Taps, of winch The purpose of .his invention is to pro- "idela simple and.f efiective means of preventing the escape of Water, steam or other 'llui'd normally'controlled by a valve, when the cover thereofis removed, in orderthat the internal parts" and mechanism maybe withdrawn-for examination, replacement r 'repalr'. Themeans which I provideto efonthe sidelof-the seatremote from the, main or operating valvepso cpnstructed "and-arfect this object consist of a secondary valve ranged that it will close'on: the underside of the seat only when; the main valveqis whichis' i or casing (afterward closed. by suitable sufiicie'ntly withdrawn. The secondary valve ert-ed through an aperture provided' in th underside of the valvebody means) 1s constructed preferably with a stem designed to carry a spring for the purpose vof insuring the. closing of the said valve on its seat as the 'ma1n'valve1sw1thdrawn. 'lihe latter" is provided upon its underside with a projecting pin, so placed thatwhen'ittthe'valve) is'closedon its seat or is-opened to any-degree up to the point of permitting the passage of afull-bore of 'fluid thejsald, pin will,-bear upon-the faceoi the. secondary valve and prevent it fron'i i elosin l the .,or ifice, but on the further'withi drawa' of the main valve, will permit the secondary valve to close the. orifice, and-to 4 be retainedon its seat by the fluid pressure supplemented by the spring But ln-order that my invention may be fully understood I shall now refer tbthe accompanying drawings. which represent sections of complete va vesI of different forins'constructedon the principle herein described." I

h valve constructed with flat seats andflvalves obvious that t 'einvention is a plicable to Figure 1 illustrates a straight through faced with an suitable, material, but it is miter valves" and seats oriother ornis. Fig.

i 2 represents a section of a right angle valve and Fi j. '3.,is a 1m on line 4; 4,-Fig.;2. l

I 'wil refer rstly tot-he form of valve shown in F ig-J 1:- The valve-casmg iaindi' 'ondary valve E.

plug or cover D for the insertion of the sec.- A' diaphragm F divides the casing and is providedwith opposing seats Gmnd H surrounding, and'concentric with, the aperture J. which may be closed by 'eitlierof the valves. A pin Isl-projects from thek underside of the main valve, bearing upon the face of .the secondary valve and is of such-a. length as will, when the main valve is in a position as to permita full How of fluid, retain the secondary valveat' a similar dista'ncefrom its own seat (as shown), but 'will allow itto close gradually oniits seat as-it- (the main valve) is'further --w1thdrawn. "The secondary valve -is provided with a s tern L arranged to slide in a cavity provided in the plug D, and a spring Masgfitted within the 'stenrfor the purpose 'hereinbeiorestated. If considered preferable the secondary valve may be operated by means of a screw or-other method in 'place of thespri'ng, but foriw'ater taps and the like the spring. device, rendering the action' automatic, will be found most suitable. v It willbe noted that the valve as illustrated in Fig; 1 is designed to be. arranged so that the flow} of fluid is in the direction indicated bythe arrow heads, but if the cover Bandthe plug 1) are made interchangeable 'the valve may be arranged so that the flow is-inithe opposite direction.

Referring now 'to Figs. 2 and '3:- th'e. "same letters of reference as in'Fig; 1 have 'been' used to indicate simil'a'rparts of the cated' by A and is provided with a cover-B for the; insertion of'the main valve C and a,

Specifications! Iietters Patent Patented Aug, 29,1911, Application" filed February -1, 1919. [semi N04 1,272.

as i valve but in" order .to-support and guide the-secondary valve, E; a ring flange or 'Wa'sher B is inserted bet-ween the flange 0" and the connecting pipe :fla-n'ge R provided -with' a' cross-bar Tcarrying the boss V for, the reception of the valve stem L and spring M, similarly to the plug D, Fig. 1. Obviouslythe distance pin would perform its function equally well if its position were reversed so that it'may, ifdesired, be sis-- cured to the supplementary and bear against the face of the main'valve:

By th-is'simple device the whole of the internal operative mechanism of a stop valve or tap may be withdrawn from the casing, without the. necessity of, shutting off the fluid' at s m d Point the'screlwing 110 backof the main valve a suflicient'distance' permitting the secondary valve to close on it's seat, thereby'preventing the escape of the r moval'of the-cover A .fiuid through the aperture ekposed re v "the partition and ada WhatIclaimis; 1-. v 1. The combination with a :valve casing flanged at its-lower end and having a" removable cover. and an apertured partition,

and a pipe below and flan ed for connection'.

with the lower flanged'e'n ofth'e casing, of

a disk valve in-the casing ada ted'to seat on one faceof' the partition, ,sa valve having'its'stem pro'ecting through the-.0over,

and provided wit 'apin projecting-from its lower .face, a igllld having an openin'g- J 'therethrough I and D secured "between the flanges'of the casing andpipe andflhiiving a recessed'.boss,'a secondary disk valve below ted to 'seaton the lower face "of said part tion, said valve hav" tween the lflanges' of t having a icentral recessed boss, I .valve below'. the partition adapted 'to seat a hollow stem projecting into hthejrecess t he boss of'the-guide plate,' and spring, inIthe-said hollow 'stem'f:

and-a pipe-flanged at its, upperxen for'coned end of the upper, face of t e partition, having its stem projecting a secondary member at the-"side'of the partition on the lower face of the said artitionfsaid' secondary valve, having a hol ow stem pro- ']'ecting'into the recess of'the said boss, a

=spri-n in the hollow stem, and a pin secured 1 to an projecting from the face of one valve and loosely engaging the opposing faceof the other valve.

3. A valve, comprising-a casinghaving a removable'cover and provided with an aper ,tured partition and a" removable recessed site from' that of. the cover, a main disk, *valveadapmd to be seated on one face-of the partition, said'valve having-a stem rig-- idly secured-thereto and projecting through "he oover anda pin projecting from its opposite face, 'a secondary disk valve ad "pt'ed to seat 'onthe opposite faceof the partition, 7 said seoondary' valve having a shallow re?- cess' inone face to receive the pin of the main valve and a hollow stem projecting from its other face into the recessof-the re-- "movable member .and guided thereby, and a" spring in the" hollow stern of-the secondary valve,"

Signed at Sydney, New South -Wales, Australia, this seventeenth day? of Deeemhen-1909,

- JoimiTHoMlts SHE O I" 

